[OASIS Issue Tracker] (TOSCA-179) Add "timeout" and "retry" keynames to an operation

Moshe Elisha created TOSCA-179:
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             Summary: Add "timeout" and "retry" keynames to an operation
                 Key: TOSCA-179
                 URL: https://issues.oasis-open.org/browse/TOSCA-179
             Project: OASIS Topology and Orchestration Specification for Cloud Applications (TOSCA) TC
          Issue Type: Improvement
          Components: Profile-YAML
            Reporter: Moshe Elisha
            Assignee: Moshe Elisha


1. Allow the user to define a timeout for a single operation execution. On expiration, the TOSCA container will mark the execution as failed with an indication that the cause was timeout.
We can choose a default time unit for this value, we can decide of a pattern "20 m" or we can have another keyname "timeout_unit" that will describe it.
IMHO, I think that seconds is the minimal time unit that will be required and it is a good default.

2. Allow the user to define a retry for an operation execution. 
If an operation fails to execute (exit code != 0 or timeout), the TOSCA container will execute the operation again until reaching the number of retries.



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